- An empty matrix is always constant.

git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk@20231 f25d12d1-65f4-0310-ae8a-bbce733d8d8e

Author: perost

Compiler/FrontEnd/Expression.mo

@@ -6721,6 +6721,7 @@ algorithm
 
     case (_, false) then false;
     case (e :: exps, _) then isConstWorkListList(exps, isConstWorkList(e, true));
+    case ({}, _) then true;
     else false;
   end match;
 end isConstWorkListList;